Sewer Inspection Checklist for Home Buyers
Know What’s Underground, Before You Buy.
When buying a home, most buyers focus on the roof, foundation, HVAC system, electrical panel, and cosmetic condition. Those inspections matter, but one of the most expensive hidden systems is often overlooked: the sewer line.
A sewer inspection checklist helps home buyers understand what should be reviewed before closing. The underground sewer line can look fine from the surface while hiding cracks, roots, bellies, offsets, standing water, or collapsed sections below the yard, driveway, or slab foundation.
Why Home Buyers Need a Sewer Inspection Checklist
A general home inspection usually does not include a full sewer camera inspection. The toilets may flush, sinks may drain, and showers may appear normal during the inspection. That does not mean the underground sewer line is healthy.
A sewer camera inspection allows the buyer to see the inside of the pipe before the option period expires. If a serious problem is found, the buyer may be able to negotiate repairs, request a seller credit, reduce the purchase price, or decide not to move forward with the purchase.
Home Buyer Sewer Inspection Checklist
1. Confirm There Is an Accessible Sewer Cleanout
The first step is to locate an accessible sewer cleanout. A cleanout is the access point where the camera can be inserted into the sewer line.
Ask these questions:
- Is there a visible cleanout in the yard?
- Is the cleanout accessible?
- Is the cleanout damaged, buried, or capped incorrectly?
- Can the sewer line be inspected from the cleanout?
2. Inspect the Sewer Line With a Camera
A proper sewer inspection should include a camera evaluation of the line from the home toward the city tap or septic connection.
The camera inspection should look for:
- Cracks
- Breaks
- Collapsed pipe
- Standing water
- Root intrusion
- Sewer bellies
- Pipe separations
- Offset joints
- Blockages
- Previous repairs
3. Identify the Sewer Pipe Material
The pipe material matters. Different pipe materials have different risks and life expectancies.
Common sewer pipe materials include:
- Cast iron
- Clay tile
- Concrete
- PVC
- ABS
- Orangeburg pipe
Older cast iron and clay sewer lines are common in many established neighborhoods. These materials may be more likely to show corrosion, scaling, root intrusion, cracks, or joint separation.
4. Check for Standing Water
Standing water inside a sewer line is one of the most important warning signs. A properly sloped sewer line should drain continuously.
Standing water may indicate:
- Improper slope
- A sewer belly
- A downstream blockage
- Settlement
- Pipe deformation
5. Look for Sewer Bellies
A sewer belly is a low section of pipe where water and waste collect. Bellies can cause recurring backups and may require excavation to repair.
Home buyers should take sewer bellies seriously, especially when the belly is long, deep, or located under a driveway, slab, or finished area.
6. Check for Root Intrusion
Tree roots can enter the sewer line through cracks, separations, loose joints, or damaged pipe. Once inside the line, roots can grow and restrict flow.
Root intrusion may indicate that the pipe has openings or defects that need repair, not just cleaning.
7. Check for Offset Joints and Pipe Separations
An offset occurs when two pipe sections no longer line up correctly. A separation occurs when pipe sections pull apart.
These defects can catch waste, allow soil into the pipe, allow roots to enter, and eventually lead to larger failures.
8. Review Any Prior Repairs
A sewer camera inspection may reveal previous repair sections. Previous repairs are not automatically bad, but they should be reviewed carefully.
Important questions include:
- Was the repair properly installed?
- Does the repair have proper slope?
- Are there offsets at the transition points?
- Is there standing water near the repair?
- Was the repair permitted and inspected if required?
9. Determine Whether the Line Is Serviceable
The main question for the buyer is simple: is the sewer line serviceable?
A serviceable sewer line should generally allow wastewater to flow properly without major restrictions, collapse, severe standing water, or significant structural defects.
10. Get Video Documentation
Do not rely only on a verbal opinion. A buyer should request video documentation of the inspection.
Video documentation helps the buyer, real estate agent, seller, and plumber clearly understand what was found.
11. Get a Written Sewer Inspection Report
A written report provides a clear record of the findings. This can be important during negotiations and repair discussions.
A good report should include:
- Property address
- Inspection date
- Access point used
- Pipe material when visible
- Defects found
- Approximate locations of defects
- Photos or video references
- Professional recommendations
12. Schedule the Inspection During the Option Period
The sewer inspection should be scheduled early in the option period. Waiting until the last day can reduce your ability to negotiate or obtain repair estimates.
If a major sewer defect is found, the buyer may need time to request a repair quote, negotiate with the seller, or make a decision before the deadline.
Red Flags Home Buyers Should Not Ignore
- No accessible cleanout
- Heavy root intrusion
- Long sections of standing water
- Collapsed pipe
- Broken cast iron pipe
- Large offsets
- Multiple pipe separations
- Recurring sewer backups disclosed by the seller
- Drain cleaning records with repeated service calls
- Sewer defects under the slab or driveway
Questions to Ask Before Closing
- Was the full sewer line inspected?
- Was the camera able to reach the city tap or septic connection?
- Were any defects found?
- Is there standing water in the line?
- Are there roots, cracks, or separations?
- Is the sewer line serviceable?
- Are repairs recommended before closing?
- Should a licensed plumber provide a repair estimate?
Why This Checklist Matters in DFW
Dallas–Fort Worth has expansive clay soil, aging neighborhoods, mature trees, older sewer materials, and many homes with underground plumbing that has never been inspected with a camera.
Homes in Dallas, Plano, Frisco, Allen, McKinney, Richardson, Garland, Irving, Carrollton, Fort Worth, Arlington, Lewisville, Flower Mound, Grapevine, and surrounding areas can all benefit from a sewer inspection before closing.
Final Recommendation for Home Buyers
Before buying a home, do not assume the sewer line is fine because the toilets flush. The sewer line is underground, hidden, and expensive to repair. A sewer camera inspection gives you information before closing, when you still have negotiating power.
Use this sewer inspection checklist before you buy. It may help you avoid one of the most expensive surprises in homeownership.
Schedule a Sewer Inspection in DFW
The Sewer Inspection Company provides sewer camera inspections for home buyers, real estate agents, investors, and homeowners throughout Dallas–Fort Worth.
Call Now: 972-333-5448
Email: stshipler@gmail.com
Website: TheSewerInspectionCompany.com
Know What’s Underground, Before You Buy.